BD Address with external memory

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Last post
Thu, 2014-09-11 03:11
#1
Shuhei Matsushita
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Last seen:1 year 8 months ago
Joined:2014-01-27 06:53
BD Address with external memory

Hello Dialog Team

I want to reflect BD Address which read form a specific area of external memory to DA14580 .
In AN-B23 chapter 9.1.1 and chapter 12.5 , example source has been described for only trimmig value.
About BD address value read from External memory, I do not know the modification .
How should BD address value from extenal memory reflect to DA14580 ?

Best Regards

Fri, 2014-09-12 16:14
WT_Dialog
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Joined:2013-12-05 14:43
Hi Shuhei,

Hi Shuhei,

BD address is loaded by custom_nvds_get_func into the stack.

uint8_t custom_nvds_get_func(uint8_t tag, nvds_tag_len_t * lengthPtr, uint8_t *buf)
{
uint8_t status = NVDS_FAIL;
switch (tag)
{
case NVDS_TAG_BD_ADDRESS:
#ifdef BDADDR_FROM_OTP //check if dev_bdaddr is not zero
{
if(memcmp(&dev_bdaddr, &co_null_bdaddr, NVDS_LEN_BD_ADDRESS))
{
memcpy(buf,&dev_bdaddr,NVDS_LEN_BD_ADDRESS);
*lengthPtr = NVDS_LEN_BD_ADDRESS;
return NVDS_OK;
}
}
#endif
if (nvds_data_ptr->NVDS_VALIDATION_FLAG & BD_ADDRESS_VALID)
{
if (*lengthPtr < NVDS_LEN_BD_ADDRESS)
{
*lengthPtr = 0;
status = NVDS_LENGTH_OUT_OF_RANGE;
}
else
{
memcpy(buf,nvds_data_ptr->NVDS_TAG_BD_ADDRESS,NVDS_LEN_BD_ADDRESS);
*lengthPtr = NVDS_LEN_BD_ADDRESS;
status = NVDS_OK;
}
}
break;
Instead of copying BD address from the OTP, you can copy the BD address from the flash and assign it the the "buf".
Hope this answers your question.
Tue, 2014-09-16 10:43
Shuhei Matsushita
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Last seen:1 year 8 months ago
Joined:2014-01-27 06:53
Hello Dialog Team

Hello Dialog Team

Thanks for your reply.
I confirmed it works well by copying the BD address read from external memory to "buf" in nvds.c, .
I appreciate your information.

BestRegards

Best Regards

Wed, 2016-12-28 10:15
double524
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Last seen:3 years 10 months ago
Joined:2016-11-22 02:10
Hi, Dialog

Hi, Dialog
My chipset is also 14580.
I want to change BD address dynamically, therefor, I reference this artical.
I know I must modify custom_nvds_get_func in nvds.c
so I prepare a bd address in char array: {{0x61},{0x62},{0x63},{0x64},{0x65},{0x66}}
here is my custom_nvds_get_func:

extern char device_bd_addr[6];
uint8_t custom_nvds_get_func(uint8_t tag, nvds_tag_len_t *lengthPtr, uint8_t *buf)
{
switch (tag)
{
case NVDS_TAG_BD_ADDRESS:
if (nvds_data_ptr->NVDS_VALIDATION_FLAG & BD_ADDRESS_VALID)
{
if (*lengthPtr < NVDS_LEN_BD_ADDRESS)
{
*lengthPtr = 0;
return NVDS_LENGTH_OUT_OF_RANGE;
}
else
{
uint8_t buf1[6];
memcpy(&buf1,&device_bd_addr,NVDS_LEN_BD_ADDRESS);
*lengthPtr = NVDS_LEN_BD_ADDRESS;
return nvds_get_func(tag, lengthPtr, buf1);
}
}
break;
}
return nvds_get_func(tag, lengthPtr, buf);
}

my invoker is in uart_sps.c

nvds_tag_len_t lengthPtr;
uint8_t buff1[6];
uint8_t re = custom_nvds_get_func(NVDS_TAG_BD_ADDRESS, &lengthPtr, buff1);
if(re == NVDS_OK)
{
app_gapm_reset_msg_create();
app_easy_gap_advertise_with_timeout_stop();
app_easy_gap_undirected_advertise_start();
}

The final bd address had really changed (not default{0x00, 0x00, 0x00, 0xCA, 0xEA, 0x80} ), but its value is not expected {{0x61},{0x62},{0x63},{0x64},{0x65},{0x66}}
it is 0x00, 0x06, 0x00, 0x00, 0x00, 0x00
what's wrong?

Mon, 2017-01-02 16:23
MT_dialog
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Last seen:1 hour 42 min ago
Staff
Joined:2015-06-08 11:34
Hi double524,

Hi double524,

I dont exactly get what you are trying to do, but why you allocate an extra local array and copy the bd address from the array that you allready have in a global variable and also why after doing that you call the nvds_get_func() again ?

只要做以下,你将能够get the advertising address that you want from the device_bd_addr array that you have set.

case NVDS_TAG_BD_ADDRESS:
{
if (nvds_data_ptr->NVDS_VALIDATION_FLAG & BD_ADDRESS_VALID)
{
if (*lengthPtr < NVDS_LEN_BD_ADDRESS)
{
*lengthPtr = 0;
return NVDS_LENGTH_OUT_OF_RANGE;
}
else
{
memcpy(buf,device_bd_addr,NVDS_LEN_BD_ADDRESS);
*lengthPtr = NVDS_LEN_BD_ADDRESS;
return(NVDS_OK);
}
}
break;
}

Thanks MT_dialog